نتایج جستجو برای: carcinogen metals
تعداد نتایج: 70924 فیلتر نتایج به سال:
The dose of carcinogen applied to the skin is one of the most important factors determining the ultimate tumor incidence (9, 10). However, the experiment of Calcutt and Powell (3) demonstrated that the effective dose of the carcinogen may be considerably lower than that measured onto the skin. Using fluorimetric methods and a single application of 3 mg. of benzpyrene (0.05 ml. of a 6 per cent s...
When administered prior to or at the time of carcinogen exposure, the phenolic antioxidants butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) are effective inhibitors of carcinogenesis in several target organs. However, chronic, postcarcinogen administration of BHT apparently enhances tumorigenesis in certain animal models for liver and lung cancer. The present study was perform...
The heavy metals cadmium, lead and mercury are common air pollutants , being emitted mainly as a result of various industrial activities. Although the atmospheric levels are low, they contribute to the deposition and build-up in soils. Heavy metals are persistent in the environment and are subject to bioaccumulation in food-chains. Cadmium exposures are associated with kidney and bone damage. C...
obtaining a continuous source of normal cells or dna from a single individual has always been a rate limiting step in biomedical research. availability of lymphoblastoid cell lines (lcls) as a surrogate for isolated or cryopreserved peripheral blood lymphocytes has substantially accelerated the process of biological investigations. lcls can be established by in vitro infection of resting b cell...
A novel macrocyclic organotin(iv) carboxylate {[n-Bu2Sn(O)]9(CH2CH3)2L}·3CH2CH3OH (complex 1) (L = (9-carboxymethyl-1,3,8,10-tetraoxo-3,8,9,10-tetrahydro-1H-anthra[2,1,9-def;6,5,10-d'e'f']diisoquinolin-2-yl)-acetic acid) was generated by the reaction of dibutyltin oxide with amide dicarboxylic acid L and characterized by elemental analysis, IR, (1)H and (13)C NMR spectroscopy. X-ray crystallogr...
Physico-chemical properties, such as the boiling point, molar refraction, critical pressure, viscosity, chromatographic retention, etc. are rather simple experimental available properties of chemical compounds. They are tabulated and may be used e.g., in projecting industrial instalations. Sometimes, it happends that a given compound is toxic, or dangereus or simply not available. In such condi...
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